<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <script>
      const res = prompt("number?");
      if (res > 0) {
        console.log(1);
      } else if (res < 0) {
        console.log(-1);
      } else {
        console.log(0);
      }
    </script>
  </body>
</html>
